springboot整合druid、mybatis

目的：

　　1、springboot配置数据库连接池druid

　　　　　　测试druid中url监控

　　2、springboot整合mybatis

　　　　　　测试查删案例

　　3、springboot整合pagehelper

---

springboot配置数据库连接池druid

　　druid学习地址

https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter

　　新建springboot项目，把要用的服务选上

导入druid相关pom依赖

<!--导入druid所需pom依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>

配置application.yml

application.yml配置devtools热加载

spring:
  datasource:
    #1.JDBC
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/t224?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
    username: root
    password: root
    druid:
      #2.连接池配置
      #初始化连接池的连接数量 大小，最小，最大
      initial-size: 5
      min-idle: 5
      max-active: 20
      #配置获取连接等待超时的时间
      max-wait: 60000
      #配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
      time-between-eviction-runs-millis: 60000
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      min-evictable-idle-time-millis: 30000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: true
      test-on-return: false
      # 是否缓存preparedStatement，也就是PSCache  官方建议MySQL下建议关闭   个人建议如果想用SQL防火墙 建议打开
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
      filter:
        stat:
          merge-sql: true
          slow-sql-millis: 5000
      #3.基础监控配置
      web-stat-filter:
        enabled: true
        url-pattern: /*
        #设置不统计哪些URL
        exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
        session-stat-enable: true
        session-stat-max-count: 100
      stat-view-servlet:
        enabled: true
        url-pattern: /druid/*
        reset-enable: true
        #设置监控页面的登录名和密码
        login-username: admin
        login-password: admin
        allow: 127.0.0.1
        #deny: 192.168.1.100

pringboot整合druid成功截图

启动SpringBoot项目访问druid，  http://localhost:tomcat端口号/项目名称/druid/

测试druid中url监控

　　创建一个测试类看看运行页面时，有没有检测到url

　　

package com.ht.springboot02.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * @author 黄大娘
 * @company dogsun公司
 * @create 2019-11-09 11:48
 */
@RestController
@RequestMapping("/dome")
public class HelloController {
    @RequestMapping("/sc")
    public String test01(){
        return "常记溪亭日暮，沉醉不知归路.";
    }
}

页面测试成功来着，我们看看druid监视是否成功

　　

很明显监控到了，所以Springboot整合druid成功

---

springboot整合mybatis

　　首先相关整合需要的pom依赖必不可少

<!--更改springboot中的mysql版本，逆向生成不兼容高版本-->
<mysql.version>5.1.44</mysql.version>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
    <scope>runtime</scope>
</dependency>

<resources>
    <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
    <resource>
        <directory>src/main/java</directory>
        <includes>
            <include>**/*.xml</include>
        </includes>
    </resource>
    <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
    <resource>
        <directory>src/main/resources</directory>
        <includes>
            <include>*.properties</include>
            <include>*.xml</include>
            <include>*.yml</include>
        </includes>
    </resource>
</resources>

<plugin>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-maven-plugin</artifactId>
    <version>1.3.2</version>
    <dependencies>
        <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
    </dependencies>
    <configuration>
        <overwrite>true</overwrite>
    </configuration>
</plugin>

添加逆向生成文件配置generatorConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    <!-- 引入配置文件 -->
    <properties resource="jdbc.properties"/>

    <!--指定数据库jdbc驱动jar包的位置-->
    <classPathEntry location="C:\development_tool\maven_cang\mysql\mysql-connector-java\5.1.44\mysql-connector-java-5.1.44.jar"/>

    <!-- 一个数据库一个context -->
    <context id="infoGuardian">
        <!-- 注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
        </commentGenerator>

        <!-- jdbc连接 -->
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        <!-- 类型转换 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 01 指定javaBean生成的位置 -->
        <!-- targetPackage：指定生成的model生成所在的包名 -->
        <!-- targetProject：指定在该项目下所在的路径  -->
        <javaModelGenerator targetPackage="com.ht.springboot02.entity"
                            targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否对model添加构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否针对string类型的字段在set的时候进行trim调用 -->
            <property name="trimStrings" value="false"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        <!-- 02 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="com.ht.springboot02.mapper"
                         targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- 03 生成XxxMapper接口 -->
        <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
        <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
        <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
        <javaClientGenerator targetPackage="com.ht.springboot02.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- 配置表信息 -->
        <!-- schema即为数据库名 -->
        <!-- tableName为对应的数据库表 -->
        <!-- domainObjectName是要生成的实体类 -->
        <!-- enable*ByExample是否生成 example类 -->

        <table schema="" tableName="t_mvc_book" domainObjectName="Book"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
            <property name="useActualColumnNames" value="true" />
        </table>
    </context>
</generatorConfiguration>

jdbc.properties文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/t224?useUnicode=true&characterEncoding=UTF-8&nullCatalogMeansCurrent=true
jdbc.username=root
jdbc.password=root

逆向生成集成到maven中的命令

mybatis-generator:generate -e

测试查删案例

不能忘了在启动类中添加注解

@MapperScan("com.ht.springboot02.mapper")

Springboot02ApplicationTests

package com.ht.springboot02;

import com.ht.springboot02.entity.Book;
import com.ht.springboot02.service.BookService;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class Springboot02ApplicationTests {

    @Autowired
    private BookService bookService;
    @Test
    public void deleteByPrimaryKey(){
        bookService.deleteByPrimaryKey(12);
    }

    @Test
    public void selectByPrimaryKey(){
        Book book = bookService.selectByPrimaryKey(12);
        System.out.println(book);
    }

}

---

springboot整合pagehelper

　　导入pom依赖

        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>

在application.yml中引入相关配置

#pagehelper分页插件配置
pagehelper:
  helperDialect: mysql
  reasonable: true
  supportMethodsArguments: true
  params: count=countSql

#显示日志
logging:
  level:
    com.ht.springboot02.mapper: debug

PageBean工具类

package com.ht.springboot02.util;
import javax.servlet.http.HttpServletRequest;
import java.io.Serializable;
import java.util.Map;
public class PageBean implements Serializable {
    private static final long serialVersionUID = 2422581023658455731L;
    //页码
    private int page = 1;
    //每页显示记录数
    private int rows = 10;
    //总记录数
    private int total = 0;
    //是否分页
    private boolean isPagination = true;
    //上一次的请求路径
    private String url;
    //获取所有的请求参数
    private Map<String, String[]> map;

    public PageBean() {
        super();
    }
    //设置请求参数
    public void setRequest(HttpServletRequest req) {
        String page = req.getParameter("page");
        String rows = req.getParameter("rows");
        String pagination = req.getParameter("pagination");
        this.setPage(page);
        this.setRows(rows);
        this.setPagination(pagination);
        this.url = req.getContextPath() + req.getServletPath();
        this.map = req.getParameterMap();
    }
    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public Map<String, String[]> getMap() {
        return map;
    }

    public void setMap(Map<String, String[]> map) {
        this.map = map;
    }

    public int getPage() {
        return page;
    }

    public void setPage(int page) {
        this.page = page;
    }

    public void setPage(String page) {
        if (null != page && !"".equals(page.trim()))
            this.page = Integer.parseInt(page);
    }

    public int getRows() {
        return rows;
    }

    public void setRows(int rows) {
        this.rows = rows;
    }

    public void setRows(String rows) {
        if (null != rows && !"".equals(rows.trim()))
            this.rows = Integer.parseInt(rows);
    }

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public void setTotal(String total) {
        this.total = Integer.parseInt(total);
    }

    public boolean isPagination() {
        return isPagination;
    }

    public void setPagination(boolean isPagination) {
        this.isPagination = isPagination;
    }

    public void setPagination(String isPagination) {
        if (null != isPagination && !"".equals(isPagination.trim()))
            this.isPagination = Boolean.parseBoolean(isPagination);
    }
    /**
     * 获取分页起始标记位置
     *
     * @return
     */
    public int getStartIndex() {
        //(当前页码-1)*显示记录数
        return (this.getPage() - 1) * this.rows;
    }
    /**
     * 末页
     *
     * @return
     */
    public int getMaxPage() {
        int totalpage = this.total / this.rows;
        if (this.total % this.rows != 0)
            totalpage++;
        return totalpage;
    }
    /**
     * 下一页
     *
     * @return
     */
    public int getNextPage() {
        int nextPage = this.page + 1;
        if (this.page >= this.getMaxPage())
            nextPage = this.getMaxPage();
        return nextPage;
    }
    /**
     * 上一页
     *
     * @return
     */
    public int getPreivousPage() {
        int previousPage = this.page - 1;
        if (previousPage < 1)
            previousPage = 1;
        return previousPage;
    }

    @Override
    public String toString() {
        return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination
                + "]";
    }
}

PagerAspect类

package com.ht.springboot02.aspcet;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.ht.springboot02.util.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
@Aspect
public class PagerAspect {
    @Around("execution(* *..*Service.*Pager(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable{
        Object[] params = args.getArgs();
        PageBean pageBean = null;
        for (Object param : params) {
            if(param instanceof PageBean){
                pageBean = (PageBean) param;
                break;
            }
        }
        if (pageBean !=null && pageBean.isPagination())
        PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        Object proceed = args.proceed(params);
        if (pageBean !=null && pageBean.isPagination()){
            PageInfo pageInfo = new PageInfo((List) proceed);
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return proceed;
    }
}

转换格式Stringutil类

package com.ht.springboot02.util;

public class StringUtil {
    public static String toLikeStr(String str){
        return "%"+str+"%";
    }
}

测试

@Test
    public void bookPager(){
        Map map = new HashMap();
        map.put("bname","圣墟");
        PageBean pageBean =new PageBean();
        pageBean.setPage(5);
        List<Map> list  = this.bookService.bookPager(map,pageBean);
        for (Map m : list){
            System.out.println(m);
        }
        System.out.println(map);
    }

效果：

谢谢观看！